The Advice of Charge (AoC) facility, provides information on
the estimated cost of individual outgoing calls made via your PBX. The cost is
an estimation of final charge and does not include any discounts. The
information is delivered at the end of the call.
The AoC information is
transmitted via SIP signaling to customer’s premises and can be enabled for
SIP2SIP* connection and/or SIP2ISDN connections.
*ETSI TS 183 047 (ETSI/TISPAN)
or 3GPP TS 24.647 (3GPP) and 3GPP TS 29.658